Abstract
According to the data obtained in the autumn-winter period, the excess of PM2.5 in air during the schoolday after a short stay by pupils in the school yards was 1.5 –2 times. The PM2.5 concentration in the autumn - winter period was up to 1.5 times higher than that of the spring – summer time. High concentrations of dust particles are observed in areas close to heavy traffic in winter in the South-Eastern part of the city. Low concentrations were recorded in the autumn-winter time in areas adjacent to forests in the North –Western part of the city of Tiaret. However, the protective function of forest stands in the spring – summer period in the North-Western part of the city of Tiaret is less evident. The need for introduction of several nature protection measures in the city is obvious. Among them: fuel quality control and fines for the use of low-grade fuel, increasing the density of trees and shrubs in the city in the areas uncovered by vegetation.
Highlights
Dusty atmosphere is currently the anthropogenic activities
Fine dust particles come from a variety of sources, temperature are microclimatic variables obtained among which the main products are anthropogenic by multispectral satellite images
It was necessary to assess the possible risks associated with dry or wet deposition of dust particles suspended in the surface layer, as well as to determine the places of formation of surface runoff of the analyzed area, taking into account the fact that the surface of the city of Tiaret is covered with both asphalt and stone blocks (Fig. 3)
Summary
Dusty atmosphere is currently the anthropogenic activities. Fine dust particles come from a variety of sources, temperature are microclimatic variables obtained among which the main products are anthropogenic by multispectral satellite images. Atmospheric particles can be divided proportion of emissions from vehicles into the into two categories according to their sources, environment are from paved roads. Features of the namely primary and secondary sources. Particles landscape affect the urban surface runoff. Most of the primary sources are emitted directly into the human activities occur on the urban impervious air, while the particles of secondary sources PM2.5 are formed in the process of chemical reactions of surface (Carlson and Arthur, 2000). The share of the surface of an urban area occupied by such gases as sulphur dioxide (SO2), volatile organic hydrocarbons, oxides of nitrogen (NOx) and ammonia (Dunea D. et al, 2016)
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